Correct

吃粉笔灰

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Strokes
https://i.cchatty2.com/filters:format(webp)/fit-in/684x0/img/202102/吃粉笔灰-Chinese-idioms-Cchatty-b31e3bb5-4bb9-490a-8982-bc0a320845f7-1612776666.jpg

Collocation

1
吃了一辈子粉笔灰
2
去吃粉笔灰
3
吃粉笔灰的人
4
吃一辈子吃粉笔灰
5
都是吃粉笔灰的
6
让老师不再吃粉笔灰

Definition

吃粉笔灰

Literally means:

eat dust

Actually means:

pursue the profession of teaching; be a teacher

A teacher inhales chalk powder when writing on the blackboard. This phrase metaphorically means having a career as teacher. It is a humorous expression.

教师用粉笔在黑板上写字时吸入粉笔灰。借指当教师。含有诙谐的意味。

Example

Used as predicate, attributive or object. It can also be used with other words in between. (作谓语、定语、宾语,中间可插入别的词语)
1
Yòng
diànnǎo
电脑
jiàoxué
教学
  
,
可以
jiéshěng
节省
zài
hēibǎn
黑板
shàng
xiě
写字
de
shíjiān
时间
  
,
jiàoshī
教师
不必
zài
chī
fěn
粉笔
huī
le
  

With computer teaching, you can save time writing on the blackboard, teachers no longer have to eat chalk ash.

2
Zhè
duì
chī
le
bèizi
一辈子
fěn
粉笔
huī
de
lǎo
夫妻
  
,
shí
几十
nián
lái
jīng
已经
péiyǎng
培养
le
shǔ
qīng
de
yǒuyòng
有用
réncái
人才
  
,
suàn
de
shàng
shì
táomǎntiānxià
桃李满天下
de
rén
le
  

The old couple, who have eaten ash all their lives, have cultivated countless useful talents over the decades.

3
xué
大学
gāng
毕业
  
,
jiù
le
suǒ
zhōngxué
中学
chī
fěn
粉笔
huī
  

As soon as I graduated from college, I went to a middle school to eat chalk ash.